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    Wyświetlanie 1-14 z 14
    Tytuł:
    Chlorodiscus natans Peter. and Hans. [Chlorophyceae] from a mesotrophic peat bog in Lower Silesia [South-Western Poland]
    Autorzy:
    Matula, J
    Powiązania:
    https://bibliotekanauki.pl/articles/59365.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Polska
    Chlorodiscus natans
    Chlorophyceae
    botany
    Lower Silesian region
    peat bog
    taxonomy
    Opis:
    The paper concerns a very rare and poorly known species of green alga Chlorodiscus natans Petersen & Hansen, discovered in the peat bog "Brzeźnik" near Bolesławiec (Poland). This is the second stand so far discovered in the world. The collected material allowed complementing the knowledge on organization of colonies, morphology and way of hair development. The remaining features, particularly the structure of the cell, are in concordance with the hitherto diagnosis of that species. The paper presents problems connected with the taxonomic affiliation of the species and describes the ecological conditions of habitats occupied by this alga.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2004, 73, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dicranochaete quadriseta [Kors]. Nov. and Pop. from an oligominerotrophic peat bog in Lower Silesia [South-Western Poland]
    Autorzy:
    Matula, J
    Powiązania:
    https://bibliotekanauki.pl/articles/57900.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    geographic distribution
    ecology
    Silesian region
    Polska
    Dicranochaete quadriseta
    Chlorophyceae
    Gloedendrales
    morphology
    taxonomy
    Dicranochaete
    peat bog
    Lower Silesian region
    Opis:
    Dicranochaete quadriseta (Korš.) Nov. and Pop. was collected during investigations of algae from mountain peat bogs of the Sudeten Mts (Poland). The paper describes the morphology, taxanomy, geographical distribution and ecological conditions of this species. This very rare species was found in an oligominerotrophic peat bog called "Topieliska-Zieleniec" near Duszniki (Orlickie Mts).
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of sulphur fertilization upon biomass dry matter production dynamics and glucosinolate biosynthesis in three types of winter oilseed rape [Brassica napus L.]
    Autorzy:
    Zukalova, H.
    Matula, J.
    Vasak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/833850.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    oil seed
    biomass
    oilseed rape
    Brassica napus
    winter oilseed rape
    production dynamics
    dry matter
    sulphur fertilization
    transgenic plant
    hybrid
    glucosinolate biosynthesis
    sulphur uptake
    Źródło:
    Rośliny Oleiste - Oilseed Crops; 2001, 22, 1
    1233-8273
    Pojawia się w:
    Rośliny Oleiste - Oilseed Crops
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomical studies on Hormotila ramosissima Kors. [Chlorophyceae]
    Autorzy:
    Matula, J
    Pietryka, M.
    Richter, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/56514.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    taxonomy
    Hormotila ramosissima
    Chlorophyceae
    morphology
    reproduction
    peat bog
    Opis:
    Hormotila ramosissima Korš., a very rare in the world and poorly known species, have been found in peat bogs of Lower Silesia. The growth stages typical of this species but unknown so far, have been described and illustrated. It was found that this species has many features in common with the representatives of Volvocales, Tetrasporales, and chlorococcales. The regularly observed zoospores and hemizoospores, which accompanied the various developmental stages of that species, showed an internal structure of Chlamydomonas-type. Studies on Hormotila ramosissima were based on live material collected in ample quantities from peat bogs. The collected in this way repeatable and abundant data allowed to discuss problems concerning morphology, reproduction and development, as well as consider the taxonomic position this species.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 2; 149-156
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of sulphur on the yield and quality of winter oilseed rape
    Autorzy:
    Zukalova, H.
    Matula, J.
    Kuchtova, P.
    Miksik, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/833507.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    oil seed
    oilseed rape
    Hydro Sulfan fertilizer
    sulphur
    ammonium sulphate
    winter oilseed rape
    sulphur fertilization
    yield
    oil content
    quality
    glucosinolate content
    Źródło:
    Rośliny Oleiste - Oilseed Crops; 2001, 22, 2
    1233-8273
    Pojawia się w:
    Rośliny Oleiste - Oilseed Crops
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cyanobacterial and green algal assemblages in various tundra habitats in the high Arctic (West Spitsbergen, Norway)
    Autorzy:
    Richter, D.L.
    Matula, J.
    Pietryka, M.
    Wojtun, B.
    Zwolicki, A.
    Zmudczynska-Skarbek, K.
    Stempniewicz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/58355.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    The diversity of cyanobacteria and algae from various microhabitats in Spitsbergen is comparatively well known. However, the relationships between environmental factors and the structure of microflora communities remain largely unclear. This study was conducted in Hornsund Bay, which exhibits large variability in the physicochemical characteristics of habitats, particularly with regard to the availability of nitrogen and phosphorus. This variability, to a large degree, is caused by seabird colonies, which fertilize nutrient-poor terrestrial ecosystems near their nesting areas. The large variations in ecological conditions and vegetation types in the study area aid assessment of habitats representing different combinations of factors potentially influencing the formation of cyanobacterial and algal assemblages. The aim of this study was to examine the influence of physicochemical parameters on the taxonomic composition and diversity of green algae and cyanobacteria (particularly the coccoid, oscillatorialean, and heterocystous taxa). The study encompassed two groups of habitats – soil surface habitats and water-saturated habitats, both characterized by diverse influences of seabird colonies, vegetation cover, and moisture. Our results showed that taxonomic diversity and composition of cyanobacteria and algae were mainly influenced by P–PO₄³⁻, N–NH₄⁺ and Ca²⁺ (soil surface habitats), and NO₃⁻, as well as moisture (index of wetness) and pH (water-saturated habitats). The variability of these physicochemical properties was largely due to the variability of the seabird colony influence. Taken together, our findings aid in understanding the processes of formation of phycoflora assemblages in Arctic tundra.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2018, 87, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Microstructure and Mechanical Properties of the AlSi17Cu5 Alloy after Heat Treatment
    Mikrostruktura i właściwości mechaniczne stopu AlSsi17Cu5 po obróbce cieplnej
    Autorzy:
    Piątkowski, J.
    Matuła, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/355225.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting Al-Si-Me alloys
    solution heat and aging
    mechanical properties
    microstructure
    stopy odlewnicze Al-Si-Me
    poddawanie przesyceniu i starzeniu
    właściwości mechaniczne
    mikrostruktura
    Opis:
    In the paper results of the microstructure and mechanical properties (HB, Rm and R0,2) of AlSi17Cu5 alloy, subjected by solution heat treatment (500ºC/6h/woda) and aging (200ºC/16h/piec) are presented. In next step the alloy was modified and heated significantly above the Tliq temperature (separately and together). It was found that the increase in the strength properties of the tested alloy after heat treatment compared to alloys without solution heat treatment and aging was due to precipitation hardening. The applied aging treatment of ingots (preceded by solution heat treatment), causes not only increase in concentration in α(Al) solid solution, but also a favorable change of the primary Si crystals morphology. During stereological measurements significant size reduction and change in the morphology of hypereutectic silicon crystals ware found. This effects can be further enhanced by overheating the alloy to a temperature of 920ºC and rapid cooling before casting of the alloy.
    W pracy przedstawiono wyniki badań mikrostruktury i właściwości mechanicznych (HB, R,m i R0,2) odlewów ze stopu AlSi17Cu5 poddanych przesycaniu (500ºC/6h/wrząca woda) i starzeniu (200ºC/16h/piec) po procesie modyfikowania i znacznego przegrzania powyżej temperatury Tliq. (oddzielnie oraz łącznie). Stwierdzono, że podwyższenie właściwości wytrzymałościowych badanego stopu po obróbce cieplnej w stosunku do odlewów bez przesycania i starzenia nastąpiło na skutek utwardzania wydzieleniowego. Zastosowany zabieg starzenia poprzedzony przesycaniem, wywołuje nie tylko wzrost stężenia w roztworze stałym α(Al), ale też korzystną zmianę morfologii pierwotnych kryształów krzemu. Na podstawie pomiarów parametrów stereologicznych stwierdzono istotne zmniejszenie i zmianę morfologii nadeutektycznych kryształów krzemu, co dodatkowo można zintensyfikować przegrzaniem stopu do temperatury 920ºC i szybkim chłodzeniem przed odlaniem.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 1814-1817
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oil pipeline leak detection using GPR method - simple case study
    Autorzy:
    Fąfara, Z.
    Lewandowska-Śmierzchalska, J.
    Matuła, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/299301.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    pipelines
    leak detection
    GRP method
    computer simulation
    finite element modelling
    Opis:
    Modelling experiment was used to investigate the abilities of using ground penetrating radar (GPR) to detect oil leaks in the underground pipeline system. Leaks not only waste precious natural resources but also create substantial damage to the transportation system within urban environments. Surface geophysical methods are noninvasive tools used to characterize the changes in the physical properties of the subsurface material. This characterization, in consequence, is used to interpret the geological and hydrogeological conditions of the strata. GPR is a reflection-based technique which uses high frequency electromagnetic waves to acquire subsurface information. GPR responds to changes in electrical properties, which are a function of soil and rock material and moisture content. A simple experiment was conducted to determine the validity and effectiveness of GPR technology in detecting leakage in metal pipelines. Initially, a prototype model was designed to simulate a pipe leak. A 1.5 GHz antenna modeling mode was used to collect GPR data. The test was modelled using sandy soil material that is representative for pipelines construction. Also model simulations are being used to select an appropriate equipment configuration (frequency band, type of antenna and real-time imaging software) prior to data acquisition.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 165-171
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Ceramic Injection Moulding and Pressure Infiltration to the Manufacturing of Alumina/AlSi10Mg Composites
    Autorzy:
    Matula, G.
    Krzysteczko-Witek, J.
    Tomiczek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/352031.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composite materials
    pressure infiltration
    ceramic injection moulding
    aluminium alloy
    Al2O3
    Opis:
    Ceramic injection moulding and gas pressure infiltration were employed for the manufacturing of alumina/AlSi10Mg composites. Porous ceramic preforms were prepared by mixing alumina powder with a multi-binder system and injection moulding of the powder polymer slurry. Then, the organic part was removed through a combination of solvent and thermal debinding, and the materials were finally sintered at different temperatures. The ceramic preforms manufactured in this way were infiltrated by an AlSi10Mg alloy. The microstructure and properties of the manufactured materials were examined using scanning electron microscopy, mercury porosimetry and bending strength testing. The results of transmission electron microscopy and scanning electron microscopy observations show that the fabricated composite materials are characterised by the percolation type of the microstructure and a lack of unfilled pores with good cohesion at the metal-ceramic interfaces. This is surprising considering that over 30% of the pores are smaller than 1 μm. The results show that the bending strength of the obtained composites decreased with increasing sintering temperature of the porous preforms.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 2101-2106
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of high energy ball milling on the structure and phase decomposition of the multiferroic Bi₅Ti₃FeO₁₅ ceramics
    Autorzy:
    Dercz, J.
    Zubko, M.
    Dercz, G.
    Matuła, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075760.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.85.+t
    61.05.cp
    68.37.Lp
    81.20.Wk
    Opis:
    The paper presents the results of the Bi₅Ti₃FeO₁₅ multiferroic phase stability analysis during high-energy ball milling aimed at obtaining fine dispersion ceramic powder. The X-ray diffraction and transmission electron microscopy methods were used to analyse the structure and verify the degree of crystallite dispersion. Structural data analysis was carried out using the Rietveld method. To carry out the analysis of the morphology, the scanning electron microscopy was used. The results that were obtained showed that the high energy ball milling process results in the decomposition of the initial ceramics, where finally Bi₅Ti₃FeO₁₅ and Bi are obtained. An increase in the proportion of the amorphous phase and an increase in the dispersion of the grains and crystallites of the powder that occurs with an increase in the milling time were observed.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 852-855
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scaling of two-phase capillary pressure-saturation relationships: water-air and oil-air systems
    Autorzy:
    Kodesova, R.
    Kutilek, M.
    Vesela, J.
    Matula, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/25411.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    interfacial tension
    oil-air system
    capillary pressure-saturation relationship
    ground water
    immiscible phase
    water-air system
    soil contamination
    non-aqueous phase liquid
    Źródło:
    International Agrophysics; 2003, 17, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ecological risk associated with the onshore hydrocarbon deposits exploration
    Autorzy:
    Uliasz-Misiak, B.
    Lewandowska-Śmierzchalska, J.
    Matuła, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/299291.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    hydrocarbon deposits
    seismic surveys
    drilling works
    ecological risk
    Opis:
    Oil and natural gas exploration is performed using geophysical methods and drilling works. In areas initially identified as prospective for the occurrence of accumulation oil or natural gas based on the analysis of geological data carried out geophysical surveys. The aim of this works is to identify geological structures that could constitute hydrocarbons traps. In the case of finding the appropriate structures, the next stage of exploration work is drilling well for further recognition of the structure. These works allow to explore not only the geological profile but also the physico-chemical properties of drilled rocks and reservoir fluids. Geophysical (mainly seismic) surveys and drilling works can affect the individual elements of the environment: the atmosphere, underground and surface water, ground surface and land and rock environment in different degrees. In order to estimate the risks, threats to all elements of the environment related to the prospection of hydrocarbon deposits have been analyzed (seismic and drilling works). Environmental risk is estimated based on a modified methodology contained in the norm PN 18002. For risks associated with the exploration referred to the consequences of adverse events in relation to the individual elements of the environment and the frequency thereof (by determining the probability of their occurrence). The risk was estimated by multiplying the weight of the likelihood of adverse events weights and consequences. Risk evaluation, indicating danger tolerated, acceptable and unacceptable was also evaluated
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 1; 203-218
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent developments of non-direct methods of pipeline and leak detection
    Autorzy:
    Fąfara, Z.
    Lewandowska-Śmierzchalska, J.
    Matuła, R.
    Lewińska, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/298717.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    non-direct methods
    pipelines
    leaks detection
    risk management
    Opis:
    Industrial pipelines are used as a low-cost method of transport of various types of substances. In the last decades the number of transmission and distribution pipelines increased considerably, leading to an increased number of failures and rising the need for better and more accurate non-destructive methods of their detection and prevention. Leakage in pipeline networks causes a loss of valuable resources in the form of oil and gas. Repairing the infrastructure requires significant additional financial resources. Therefore, any damage to the pipeline network must be detected and repaired as soon as possible. Indirect methods for leak detection and localization uncover the presents of leaks from outside the pipeline by visual observation or by using appropriate equipment. Pipelines are often underground installations or run for many kilometers in areas where there are no roads, and access is extremely difficult or impossible. The underground occurrence of pipelines makes regular inspection difficult. It is also not possible to examine all pipeline sections simultaneously. Pipeline preventive maintenance or replacement program should be conducted based on detailed assessment of its technical and environmental conditions. Thus, safe and non-destructive techniques are needed, which would allow for pipeline periodical inspection without disturbing their operation.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 173-180
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Properties of YSZ Coatings Prepared by Plasma Spray Physical Vapor Deposition for Biomedical Application
    Autorzy:
    Barczyk, J.
    Dercz, G.
    Matuła, I.
    Góral, M.
    Maszybrocka, J.
    Bochenek, D.
    Gurdziel, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/356455.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    PS-PVD method
    bioactive coatings
    cp-Ti
    YSZ
    osseointegration
    Opis:
    This paper presents the study of microstructure and properties of 8 mol% yttrium stabilized zirconia coating fabricated by Plasma Spray Physical Vapor Deposition technique on commercial pure titanium. The coating was characterized by X-ray diffraction, high resolution scanning electron microscope, profilometer, nanoindentation and nanomachining tests. The X-ray phase analysis exhibit the tetragonal Zr0.935 Y0.065O1.968, TiO and α-Ti phases. The Rietveld refinement technique were indicated the changes of crystal structure of the produced coatings. The characteristic structure of columns were observed in High Resolutions Scanning Electron Microscopy. Moreover, the obtained coating had various development of surfaces, thickness was equal to 3.1(1) μm and roughness 0.40(7) μm. Furthermore, the production coatings did not show microcracks, delamination and crumbing. The performed experiment encourages carried out us to tests for osseointegration.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 779-783
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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